
21/25 orange sapphire Haunted Forrest
Was just gifted this for my Haunted Forrest rainbow by an amazing friend from the gpk community

Was just gifted this for my Haunted Forrest rainbow by an amazing friend from the gpk community
We've been planning a detached ADU on our property in Southern California and I was frustrated by how hard it was to get a real cost estimate without talking to a contractor first.
Every article I found gave ranges like "$80,000 to $350,000" which is basically useless when you're trying to decide whether to even move forward.
So I built a calculator that breaks it down by ADU type (detached, garage conversion, attached), square footage, and location. It factors in permits, site prep, and finishes — not just construction costs — and gives you a low/mid/high estimate with line items so you can see where the money actually goes.
It's completely free. I also put together a planning pack with a permit checklist (covers 20 CA counties), a contractor bid worksheet, and a financing guide if anyone wants more detail.
Free calculator in the comments